Improvement in plows



A. A. MGMAHEN. PLOW.

No. 21,975. Patef'tedv Nov. 2, 1858.

UNITED STATES PATENT OFFICE.

A. A. MCMAHEN, 0F OXFORD, MISSlSSlPPl.

IMPROVEMENT lN PLOWS.

To all whom it may concert.:

Be it known that I ALLEN ALBERT Mo- MAHEN, of Oxford, in the county of La Fayctte and State of Mississippi, have invented a new and useful Improvement in Subsoil-Plows; and I do hereby declare the following` to be a full, clear, and exact description of the construction and operation thereof, reference being had to the accompanying drawing, making a part thereof, and which 'represents a perspective View of the plow complete.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference tothe drawings.

A represents the beam of the plow, to which the handles B B are attached, said handles being further supported by a brace, 0, extending from the rear of the beam up to and having the rung D passed through its upper end.

E is the colter of the plow, which has a shoepiece, F, at its bottom and extending backward, where it is united with a brace, G, that extends upto and is united with the top of the colter Where it is let into the beam, the three pieces E F G forming a triangle.

In the upright piece or braoeGr there is a series of holes, l 2 3, for adjusting and holding when adjusted the mold-board H. The mold-board H has a slan'k,a., which passes up through the beam A, and this shank is furnished with a series of notches, 4, so that a key, 5, passed thron gh the beam horizontally, shall also pass through one of said notches, and thus hold the mold-board firmly athsadjusied point.

On the under side ot' the. mold-board there is a lng or dead-eye, (i, through which, and through oncof the hoh-.s` in the brace G, a bolt, 7, passes to hold the mold-board to the colter. Thus the mold-board may be set up or down to suit the depth of plowing that is to be done for the time being.

bistheshankofthecolter,tlatpassesthrongl the beam, and c a portion theieof that is let into the under, side ol' the beam to properly support the eolter as it in turn supports the mold-board. The shank a of the mold-board extends down along` the edge of said moldboard and underneath it., and serves as a rib to strengthen said mold-board, being Welded or otherwise fastened to it, and running out near the point thereof.

Having thus fully described the construction of my plow, what I claim therein as new, and desire to secure by Letters Patent, is-- In combination w'nh acolter having a brace and adjusting-openings tllerein, a old-bnard whose slank is made adjustable in the beam, so that said mold-board may be adjusted .to the eolter and in the beam, as herein described, the whole being combined and arranged in the manner and for the purpose set forth.

Witnesses: I A. A. MCMAHEN.

A. B. SroUGn'roN, THos. H. UPPERMAN. 

